My plan to construct the site, then just point the domain name to a site built using webserver address made the giant pathing problems.
I think your plan could still work because it's possible to change the path in the Showkase admin setup page after the site is built, then hit the setup button again and then republish. This might remove the need to do the search and replace. It could be worth updating the setup path anyway or Showkase might undo all of your changes when you republish again.
As you know, pathing issues can be tricky so take a good comprehensive backup before you hit the Setup button.
jack